Terminal or lug for electrical conductors.



C. R. BAIRD. TERMINAL 0R LUG FOR ELECTRICAL connucroas. I APPLIOATIDNIILIID MAB 19,1910. 982,563.

Patented Jan. 24, I 911 CHESTER R. BAIRD, OF NEW YORK, N. Y.

TERMINAL OR LUG FOR ELECTRICAL CONDUCTORS.

Specification of Letters Patent.

Patented J an. 24., 1911.

Application filed March 19, 1910. Serial No. 550,545.

To all whom it may concern:

lie it known that I, OlH'ISIER It. BAIRD, a citizen of the UnitedStates, residing in the city. county, and State of New York, withpost-oiiicc address at. No. I LS) Broadway, have inventtal certain newand useful Iml'nfovt-nients in 'lerminals or Lugs for Electrical(.emluctors, 0t which the following is a specification.

This invention relates to terminals or lugs il ul' electrical conductorsand especially to terminals :L'or stranded eom lnctors covered withasbestos or other insulation.

The invention has for its object the pro vision of, a terminal or lugwhich may be quickly and securely attached to an electrical(.(illtlllCtOl comprising a plurality of strands.

The invention also contemplates the pro vision of a tern'iinal or lugfor conductors of the character mentioned which can be readily securedupon the conductor so as to ati'ord good electrical contact.

Other objects oi the invention will appear in the course oil thefollowing description in which reference is had to the accompanyingdrawings.

in the (,lrawings Figure 1 is a view in longitudinal section through theterminal and a portion ot a stranded insulated con ductor to which theterminal is secured. Fig 2 is a top plan View of the terminal or lug andthe adjacent portion of the conductor to which it is secured. Fig. 3 is'a view part y inside elevation and partly in section showing a slightlymodified form of terminal and the conductor to which it is secured. I

ltelln'ring to thc drawings by reference chzn'acters, l de ignates anelectrical conductor consisting of a plurality of strands 2' and aninsulating covering 3 0t asbestos or other material. The terminal lugconn'n'ises a main member -t and a clamping member 5. 'lhemain memberprovided with a socket to receive the end of the conductor and at [theinner end of the socket a conical boss 6 is provided. The outer portionof the socket is internally threaded :torengagement with the clampingmember which is externally member is tubular in fOI'lYLflIlCl. ofsuitable bore to permit the passage of the stranded conductor whenstripped-of itsinsulation. Near its outer end, the clamping member 5 isprovided with an internal threadcution a taper and adapted to engage theinsulation on the exterior of the conductor. The'm ain member of the lagis provided with a flattened extremity 7 with an eye for engagement withthe binding post. It will be understood, however, that the form of theextremity may be altered for connection with other types of electricalconnectors than binding posts without departing from the spirit of thepresent invention.

In the modified form of terminals shown in Fig. 3, I provide, inaddition to the sethreaded to correspond. The clamping I curing devicesshown in Fig. 1, a pointed screw 8 which extends through the outerportion of the clamping member 5 and engages the conductor, thusafi'ording more effective fastening for the insulation upon theconductor.

It will be noted on inspection of Figs. 2 and 3 that the two members ofthe terminal are both of octagonal form to facilitate the gripping oithe members with a wrench, but this .t'orm may be altered if desired.

In using the terminal, the insulation is stripped from the conductor tothe extent shown in Fig. 1 and the bare strands of the conductor passedthrough the bore of the clamping member 5 which is then screwed onto theinsulation as shown in Fig. 1 leaving the end of the conductor exposedat the forward end of the clamping memben The main member of thetern'iinal is then screwed onto the clamping member, thus forcing theboss (3 in the end ofthe conductor and spreading the ends of the strandsagainst the sides of the socket in the main member and against theannular shoulder presented by the forward end of the clamping member.When the conductor is gripped in this way, it is practically impossibletodetaeh the terminal without loosening the clamping member in the mainmember and satisfactory electrical contact of the conductor with theterminal is assured.

Having thus described my invention, What and also hailing a tapered Iclaim as new and desire to secure by-Letters Patent is:

A terminal or lug for electrical conductors comprising a main memberhaving a boss at its, inner end and a tubular clamping member adapted toforce the end of the conductor into clamping engagement with the bossand adjz cent portions of the main member internally 10 threaded chamberat its outer end for engagement with insulation on the conductor. Intestimony whereof, I have signed my nsjune hereto in the presence ofwitnesses. CHESTER R. BAIRD. Witnesses Orro MUNK, SIDNEY SU'lI-IERLAND.

